clean_page_cache

What is WordPress Hook: clean_page_cache

The clean_page_cache hook in WordPress is used to clear the cache for a specific page when it is updated or modified. This hook allows developers to execute custom code whenever the page cache is cleared, ensuring that the latest version of the page is served to visitors.

Understanding the Hook: clean_page_cache

The clean_page_cache hook is located within the wp_cache_post_change() function in the wp-includes/post.php file. This function is called whenever a post is updated, deleted, or undeleted, triggering the clean_page_cache hook to clear the cache for the affected page.

Hook Parameters (if applicable): clean_page_cache

The clean_page_cache hook does not accept any arguments or parameters. It is a simple action hook that executes custom code when the page cache is cleared.

Hook Doesn’t Work: clean_page_cache

If the clean_page_cache hook doesn’t work as expected, it may be due to conflicts with other caching plugins or custom caching mechanisms. It is recommended to disable other caching solutions and test the hook again. Additionally, ensuring that the custom code attached to the hook is functioning correctly is essential for proper execution.

Best Practices & Usage Notes (if applicable): clean_page_cache

When using the clean_page_cache hook, it is important to consider the performance implications of clearing the page cache. Excessive use of this hook may result in increased server load and slower page load times. It is best practice to use this hook sparingly and only when necessary to ensure optimal website performance.

Usage Example: clean_page_cache

“`php
function custom_clear_page_cache( $post_id ) {
// Custom code to clear the page cache for the specified post
wp_cache_delete( $post_id, ‘page’ );
}
add_action( ‘clean_page_cache’, ‘custom_clear_page_cache’ );
“`

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